/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.benchmark.functions;

import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.connector.source.Boundedness;
import org.apache.flink.streaming.api.datastream.DataStreamSource;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;

import java.util.function.BiFunction;

/** Enum based factory for different Long sources. */
public enum LongSourceType {
    LEGACY(
            (env, maxValue) -> {
                return env.addSource(new LongSource(maxValue));
            }),
    F27_BOUNDED(
            (env, maxValue) -> {
                return env.fromSource(
                        new LongNewSource(Boundedness.BOUNDED, maxValue),
                        WatermarkStrategy.noWatermarks(),
                        "NewLongSource");
            }),
    F27_UNBOUNDED(
            (env, maxValue) -> {
                return env.fromSource(
                        new LongNewSource(Boundedness.CONTINUOUS_UNBOUNDED, maxValue),
                        WatermarkStrategy.noWatermarks(),
                        "NewLongSource");
            });
    private final BiFunction<StreamExecutionEnvironment, Long, DataStreamSource<Long>> factory;

    LongSourceType(BiFunction<StreamExecutionEnvironment, Long, DataStreamSource<Long>> factory) {
        this.factory = factory;
    }

    public DataStreamSource<Long> source(StreamExecutionEnvironment environment, long maxValue) {
        return factory.apply(environment, maxValue);
    }
};
